/**
 * Created by dllo on 3/28/18.
 */
public class Test05 {

    //  a += 4;=> a = a + 4;
    // +=, -=, *=, /=, %= 在代码速度上略优于加减乘除
    public static void main(String[] args) {
        int a = 3;
        a = a + 4;
        System.out.println(a);

        a += 4;
        System.out.println(a);
    }
}
